from django.db import models
from django.contrib.auth.models import  User,AbstractUser
# Create your models here.
class UserInfo(AbstractUser):
    """
    用户信息表
    """
    nid = models.AutoField(primary_key=True)
    telephone = models.CharField(max_length=11,null=True,unique=True)
    avatar = models.FileField(upload_to='avatars/',default='/avatars/default.png')
    create_time = models.DateTimeField(verbose_name='创建时间',auto_now_add=True)

    blog = models.OneToOneField(to='Blog',to_field='nid',null=True,on_delete=models.CASCADE)
    def __str__(self):
        return self.username
class Blog(models.Model):
    """
    博客信息表
    """
    nid = models.AutoField(primary_key=True)
    title = models.CharField(verbose_name='个人博客标题',max_length=64)
    site_name = models.CharField(verbose_name='站点名称',max_length=64)
    theme = models.CharField(verbose_name='博客主题',max_length=32)

    def __str__(self):
        return  self.title
class Category(models.Model):
    """
    博主个人文章分类表
    """
    nid = models.AutoField(primary_key=True)
    title =models.CharField(verbose_name='分类标题',max_length=32)
    bolg = models.ForeignKey(verbose_name='所属博客',to='Blog',to_field='nid',on_delete=models.CASCADE)

    def __str__(self):
        return self.title
class Tag(models.Model):
    nid = models.AutoField(primary_key=True)
    title = models.CharField(verbose_name='标签名称', max_length=32)
    bolg = models.ForeignKey(verbose_name='所属博客', to='Blog', to_field='nid',on_delete=models.CASCADE)
    def __str__(self):
        return self.title
class Article(models.Model):
    nid = models.AutoField(primary_key=True)
    title = models.CharField(verbose_name='文章标题', max_length=50)
    desc = models.CharField(verbose_name='文章描述', max_length=255)
    create_time= models.DateTimeField(verbose_name='创建时间',auto_now_add=True)
    content = models.TextField()

    comment_count = models.IntegerField(default=0)
    up_count = models.IntegerField(default=0)
    down_count= models.IntegerField(default=0)

    user = models.ForeignKey(verbose_name='作者',to='UserInfo',to_field='nid',on_delete=models.CASCADE)
    category = models.ForeignKey(to='Category',to_field='nid',null=True,on_delete=models.CASCADE)
    tags =models.ManyToManyField(
        to='Tag',
        through='Article2Tag',
        through_fields=('article','tag')
    )

    def __str__(self):
        return self.title

class Article2Tag(models.Model):
    nid = models.AutoField(primary_key=True)
    article = models.ForeignKey(verbose_name='文章', to='Article',to_field='nid',on_delete=models.CASCADE)
    tag= models.ForeignKey(verbose_name='标签', to='Tag', to_field='nid',on_delete=models.CASCADE)
    class Meta:
        unique_together=[
            ('article','tag'),
        ]
    def __str__(self):
        v =self.article.title+'---'+self.tag.title
        return v
class ArticleUpDown(models.Model):
    """
    点赞表
    """
    nid = models.AutoField(primary_key=True)
    user = models.ForeignKey('UserInfo',null=True,on_delete=models.CASCADE)
    article = models.ForeignKey('Article',null=True,on_delete=models.CASCADE)
    is_up = models.BooleanField(default=True)

    class Meta:
        unique_together = [
            ('article', 'user'),
        ]

class Comment(models.Model):
    """
    评论表
    """
    nid = models.AutoField(primary_key=True)
    article = models.ForeignKey(verbose_name='评论文章', to='Article', to_field='nid',on_delete=models.CASCADE)
    user = models.ForeignKey(verbose_name='评论者', to='UserInfo', to_field='nid',on_delete=models.CASCADE)
    content = models.CharField(verbose_name='评论内容', max_length=255)
    create_time = models.DateTimeField(verbose_name='创建时间',auto_now_add=True)
    parent_comment = models.ForeignKey('self',null=True,on_delete=models.CASCADE)

    def __str__(self):
        return self.content

